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In a nautical sense, a bar is a shoal, similar to a reef: a shallow formation of (usually) sand that is a navigation or grounding hazard, with a depth of water of 6 fathoms (11 meters) or less. It therefore applies to a silt accumulation that shallows the entrance to or course of a river, or creek.
Aipysurus apraefrontalis, commonly known as the short-nosed sea snake or Sahul reef snake, is a species of venomous sea snake in the family Elapidae, which occurs on reefs off the northern coast of Western Australia. English herpetologist Malcolm Arthur Smith described the species in 1926 from a specimen collected on the Ashmore Reef.
Aipysurus duboisii, also known commonly as Dubois' sea snake and the reef shallows sea snake, is a species of extremely venomous snake in the subfamily Hydrophiinae of the family Elapidae. Its geographic range includes Papua New Guinea , New Caledonia and the northern, eastern and western coastal areas of Australia , that is the Coral Sea ...
Xianbin Reef, also known as Sabina Shoal, is in disputed waters of the South China Sea near the Spratly Islands, which China calls the Nansha Islands. China claims sovereignty over most of the ...
Sea snake Temporal range: Oligocene – Recent Pre๊ ๊ O S D C P T J K Pg N Yellow-bellied sea snake (Hydrophis platurus) on a Costa Rica beach Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Squamata Suborder: Serpentes Superfamily: Elapoidea Family: Elapidae Groups included Hydrophiinae Laticaudinae Range of sea snakes shown in lime ...
• Sea snake (bottom right) Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semiaquatic life in a marine environment. Only about 100 of the 12,000 extant reptile species and subspecies are classed as marine reptiles, including marine iguanas, sea snakes, sea turtles and saltwater crocodiles. [1]
It is a common, widespread species that lives on coral reefs, including the Great Barrier Reef. [1] It can also be found in the north-eastern Pacific Ocean. [11] The snake hides in small coves or protective coral areas if not hunting or surfacing to breathe. [12]
About one quarter of fish species shoal all their lives, and about one half shoal for part of their lives. [2] Fish derive many benefits from shoaling behaviour including defence against predators (through better predator detection and by diluting the chance of individual capture), enhanced foraging success, and higher success in finding a mate.